本文介绍了什么是C#一个符号的第二个含义是什么?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我已经使用了单号(&安培;)在C#中的意思是检查第二的条件,即使是第一次声明中的假。
但下面似乎是&放一个不同的意义
干脆,可以谁能解释如何 I和1
在下面的示例
列表< INT>分数=新的List< INT> {1,2,3,4,5,6,7,8};
变种evenScores = scores.Where(ⅰ= I标记%2 == 0);
变种evenScores2 = scores.Where(ⅰ= GT;(I和1)== 0);
解决方案
一个单独的放大器&;是按位与运算符,就像说。我看问题的第二部分:为什么?它的工作原理
想想二进制:
000 = 0
001 = 1
010 = 2
011 = 3
100 = 4
101 = 5
110处= 6
111 = 7
等
请注意所有偶数数字0结束;因此,如果对1返回最后位按位检查零(意思是不匹配),它是一个偶数;
I have used the single ampersand (&) in C# to mean "check the second conditional statement even if the first is false".
But the following seems to be a different meaning of &
altogether, can anyone explain how i & 1
works in the following example?
List<int> scores = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8 };
var evenScores = scores.Where(i => i % 2 == 0);
var evenScores2 = scores.Where(i => (i & 1) == 0);
解决方案
A single & is "Bitwise AND operator", just like dove said. I'm looking at second part of question: "why it works?"
Think in binary:
000 = 0
001 = 1
010 = 2
011 = 3
100 = 4
101 = 5
110 = 6
111 = 7
and so on
Note all even numbers ends with 0; so if last bit bitwise check against 1 returns zero (meaning "doesn't match"), its a even number;
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